A uniform 0.20 T magnetic field is directed perpendicular to the page and down i

Question

A uniform 0.20 T magnetic field is directed perpendicular to the page and down into the arrangement sketched below.

This is two horizontal metal bars that are 0.060 m apart with a 0.080 m long copper rod laid across

the bars. The rod is 0.075 m to the right of the left edge of the circuit, enclosing a rectangular area

of 4.5 x 10^-3m^2. Instead of just pulling the bar to the right, the entire system is moved to the right

at 0.50 m/s. The electrical resistance of this circuit is now 0.40 ohm. The power dissipated in this

circuit is now:

Ans:0

How would I figure this out?

Explanation / Answer

since B is everywhere and A doesnt change the flux doesnt change emf = dflux/dt so no change in flux means no emf so no power dissipation

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